Metal-forming machine.



J. UHRI.

METAL FORMING MACHINE. APPLIOATION FILED Nov. 13, 1907.

922,21 7., Patented May 18, 1909.

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METAL FORMING MACHINE. APPLICATION FILED NOV. 13,1907.

Patented May 18, 1.

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J UHRI METAL FORMING MACHINE.

APPLICATION FILED NOV. 1a, 1907.

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Patented May 18, 1909.

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APPLIOATIOH FILED NOV.18, 1907.

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Patented May 18,1909.

J. UHRI. METAL FORMING MAGHIN'E. APPLICATION FILED NOV. 13 1:907. v

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JACOB UHRI, 0F LAPORTE, INDIANA, ASSIGNOR OF ONE-HALF F0 AUGUST KEMPF, OF

UAPORTE, INDIANA. v

' METAL-FORMING MACHINE.

Specification of Letters Patent.

Patented May 18, 1909.

Application filed November 13, 1907. Serial No. 401,924.

To all whom it may concern:

' Be it known that I, JACOB U-HRI, a citizen of the United States, residin at Laporte, in the county of La orte an State of Inx a new and useful Improvement in Metal-Forming Machines, of which the following is a specification.

My invention relates particularly to machines for use in forming flexible metal-tubing such as is commonly employed for hosearmor.

My primary object is to provide a machine of simple and durable construction capable of rapidly forming flexible metal tubing from a metal strip or tape which is fed into the machine.

The invention is illustrated in its preferred embodiment in the accompanying drawings, in which Figure 1 re resents a side elevational View of a tubeorming machine constructed in accordance with my invention; Fig. 2, a plan view of the same; Fig. 3, a front end elevational View of the same; Fig. 4, an enlarged broken sectional view taken as indicated at line 4. of Fig. 1; Fig. 5, a sectional view taken as indicated at line 5 of Fig. 1 and showing the guide through which the metal strip or ta e passes into the machine; Fig. 6, a view of the first set of rolls through which the ta e passes, the tape being shown in section; i 7, a section taken as indicated at line 7 of Fig. 1 and showing the guide through which the tape passes from the first set of formin rolls to the second set of forming rolls; ig. 8, a View of the second set of Form ing rolls with the tape in section as it appears after subjection to the action of the second set of forming rolls F ig. 9, a section taken as indicated at line 9 of Fig. 1 and showing the guide between the second set of forming rolls and the third set of forming rolls; Fig. 10, a View of the third set of forming rol s with the tape of the form imparted thereto by said rolls; Fig. 11, a section taken as indicated at line 11 of Fig. 1 and showing the guide through which the tape passes when it leaves the third set of forming rolls; Fig. 12, a face view of the means by which the reparatorily shaped metal tape is turned r0111 its longitudinal course through the Inachine and formed into a spiral extending at right angles to the longitudinal course of the tape, the view being taken approxin'lately tape passes from the guide shown in Fig. 11

,to the spiral forming i'ncans shown in Fig. 12;

Fig. 13, a section taken indicated at line 13 of Fig. 12; Fig. 14, an edge view of tho first s Hal-forming roll which engages the tape; ig. 15, a similar view of the second iPllfll-fOIIDiIIg roll which engages the tape;

ig. 16, a similar View of the third spiralforrning roll which engages the tape; Fig. 17, a View taken as indicated at line 17 of Fig. 4 and showing the mandrel in section and showing also a rotary dislreguipped with spiral-engaging rolls, whose function is to aid in rotating and feeding the spiral and in compressing the interlocking flanges of the convolutions of the spiral; Fig. 18, a sectional the section being taken as ind cated at line 18 of Fig. 19; Fig. 19, a section taken as indicated at line 19 of Fig. 18; Fig. 20, a topedge view of the stationary disk shown in Fig. 12, this view showing also an oblique or tapering surface which serves to deflect the metal tape from its longitudinal course through the Inachine;.Fig. 21, a pars )octi c View of a portion of the tape it is fed into the machine; 22, a similar view of a portion of the tape after it has been subjected to the action of the first pair of forming rolls; Fig. 23, a similar view of a portion of the tape after it has been subjected to the action of the second pair of forming rolls; Fig. 24, a similar view of a portion of the tape after it has been subjected to the action of the third pair of forming rolls; Fig. 25, a broken olevational View, on an enlarged scale, of a portion of the flexible tubing or armor 1n process View of one of the rollers shown in Fig. 17,

of formation and Fig. 26, a sectional view *of the same.

It may be preparatori y stated that in the operation of the machine illustrated, a-llat strip or band of metal is fed through three successive Jairs of forming rolls, from the final set of which it emerges in the form shown in Fig. 24 with acutely bent oppositely turned flanges adapted to interlock: during Fit,

Fig. 20, at the same time passing beneath the top roller shown in Fig. 12, thei'ice beneath a curved guide to the lowerleft-hand roller shown in Fig. '12, thence between the lower right-hand roller shown in Fig. 12 and the mandrel, the ilangcsof the tape being brought into interlocking; engagement as the spiral is being; formed; and that the spiral thence passes into the grip of the rollers carried by the rotary disk shown in Fig. 1.7, which exert a winding as well as a compressing effect u ion the spiral, the. combined result of which is to produce the finished flexible armor. 'ihe mandrel, it should, be observed, has a removable end-portion or collar, as a means from l ig's. -l and 17, which is irovide with a slot adapted to receive the initial end of the tape,

the collar being rotatable on its axis to form a hoolc at the end of the tape which remains in engagement with the collar, the collar being fed out with the armor and being detached from the armor after the work is coinpleted.

In tile (i()l1$tltl(fti0ll illustrated, A represents the main frame of the machine; A, a

vertically adjustable bracket or extension connected with the rear end of the main frame: 3. a guide mounted on the front end of the main. fraiiio at one lateral edge thereof; l5, l5", ii, an initial pair of forming rolls, a second pair of forming rolls, and a third pair of forming rolls, respectively, in longitudinal alinenieiit with the guide B; B, a gu de b 5 tween the tirst and second pairs of forming: rolls: a guide between the second and third pair of forming rolls; B,.a guide in th rear of the third set of forming rolls; W, a pulley mounted on the shaft of the lower one of the lirst pair of forming rolls B, through \'\lil('li poii er is supplied to the machine; t, mechanism for dellectiir; the tape from its longitudinal course, forming it into a spiral and causing t he flanges of the successive con i volut ions to ilitcrloch and l), means for gripping the spiral and exerting a twisting action thereon and compressing the interlocking: llanges of the convolulions to form the linishcd armor, or flexible metal tubing.

hefcrriinr to Figs. 21 to 34, inclusive, l represents a port ion of the inetalsl rip or ta ie which by passage through the rolls B has the metal on opposite sides of its longitudinal center strut-h in opposite directions to form 7 f)" are connected with standards 1; mounted raised portions 3 connected b\' a web It, the

- p l lateral portions ol the raised portions being beiil. baclni'ardlv somewhat to form obliipie the tlai'iges are adapted to interlock with each 5, preferably comprises two parallel bars b,

the upper one of which has a downturned flange 1) which embraces the adjacent edge of the lower bar, and the lower one of which has an upturned flange 1) which embraces the adjacent edge of the upper bar. 'Ihus is formed a guide adapted to receive a flat strip of metal. each other in form, but oppositely turned. Each of said rolls has a circumferential channel flanked on one side by a bevel surface I) and on the other side bya flange b, and adjacent to the flange b is a second bevel surface I)". The channel of each roller receives the flange b of the other roller; and the bevel surface I) of each roller isopposed to the bevel surface I) of the other roller; It will thus be understood that the rollers are adapted to give to the steel ribbon or tape the eonfi'irination shown in Fig. 22. The rolls l3 are duplicates of each other, but turned in opposite directions. They are provided with interineshing circumferential channels and flanges of rectangular shape which give to the tape the conformation shown in Fig. 23. cates ofcach other, but turned in opposite directions. Each set of rollers has a circinnferential channel I) flanked on one side by a bevel surface and on the opposite side by a-tlaiige (i said flange having an abrupt shoulder at one side and an obiique surface I) at the opposite side which forms a. \/shaped channel with an oblique surface From Fig. 10, it will be understood that l these rolls are adapted to give to the ribbon the conformation shown in Fig. 24. guide 13" is composed of bars which are long-itudinally grooved or cut away to conform to the shape of the ribbon, asshown in. Fig. 7. 'lhe'guide B is composed of bars which are longitudinally grooved to conform to the shape of the ribbon as it appears in Fig. 9.

, As appears from Fig. 1 the forming rolls B, B", B, have shafts which extend across the main frame of the machine and are jouriialcd in bearings Ii", I), the latter or upper ones'of which are \'erticall ad iistable by means of hand-wheels I), 'lhe bearings Ii,

n the main frame. the bearings being supported in slides which are vertically adllanp es l which extend in opposite directions. Q

When the strip is subjected to the action of lhe rolls ii" the llaiiges l are bent farther, so as to extend at right angles to the raised por lions L and parallel with the web-portion 3, as illustrated in Fig: 12%. Whentlie,strip passes through the rolls ii". the llangges l are bent innardl to iii-cup oblique positions,

as illustrated in Fig. .l;and in lliiscolidilion,

jnstable by means of the hand-whecls 11". Said slides support armsi which carry supplenieiital bearings b for the upper shaftsof the rollers. 'lhe shaft of the lower one of the rollers B extends beyond the shafts of the otheri'ollers and supports the pulley B 'lhe shaft with which the pulley W is connectcd is equipped with a. t lgdtliill i which meshes with a cog-wheel with The rollers B are dupliiii) llit) received by the other c iannel of the tape, as"

which the shaft of the companion roll B is equipped. Motion is transmitted from the shaft. of'the upper roller B by a sprocketchain b" to the shaft of the upper roller B and from, v saidlast named shaft by a sprocket-chain Vito the shaft of the upper roller B Motion is transmitted from the shaft of the lower roller B through a sprocket-chain b to a shaft D (Figs. 2 and 4), which constitutes the driving shaft of the spiral-gripping and rotating device D.-

The mechanism C, which serves to deflect the tape from a direct course and form it into a spiral with interlocking convolutions, comprises a stationary disk'c mounted upon a slide 0 which is carried by the vertically adjustable frame section A, the slide '0 being adjustable on the frame-section A laterally with relation to the main frame A; a mandrel 0 extending through a perforation at the axis of'the disk 0 and equipped at one end'with a hand-wheel c and havlng at the opposite end a reduced extremity c which receives a detachable collar or sleeve a: radially adjustable rollers 0", N, 0 carried 1 by the disk 0 and grouped about the mandrel;

a short hub c at the axis of the disk 0 cut away to form a guide 0 having an oblique surface 0, as shown in Figs. 12. and 20; a guide-bar 0 provided with a longitudinal slot 0 which is connected by a bolt 0. with a curved slot 0 struck on a radius from the center of the disk 0, said guide-bar 0 being provided on one side with a horizontal flange 0"; a'member 0 secured to the bar a and provided with a nose 0" which engages one of the channels of the steel tape; a member 6" provided with a channel conforming to the adjacent portion of the tape, as sl owndn Fig. 13; a member 0 provided with a nose shown in Fig. 13; and. a member (5 which proiects beyond the other members just de-' scribed and is curvcdso newhat about the hub c", as shown in Figs; 12 and 14. Tho member 0 has its lower portion bent latorally to form an oblique lip which underlies the adjacent flange of the tape, as shown in Fig. 14, whereby the tape will be held to its true course during the operation of winding to form it into a spiral. As appears from Fig. 14, the roller 0" is provided with a circumferential flange c which is-located adiacent to the stationary guide-linger c and is received with said 'uidcfingcr in the adialape; and said roller 0 is provided witha circumferential channel a flanked by ailangcc having a bovcl surfacc c The channel 0" is adapted to rcceivc the adjacent raiscd portion of the tape.

vin position by plates c The manner of engagement of the roller 0 With the tape is further illustrated in Fig. 25.

The roller 0 is rovided centrally with a circurnferential ange c and betwee id flange and the disk 0 with a smaller flange 0 having a bevel surface a. The manner in which the roller 0 engages the spiralis shown in Fig. 26, from whlch it appears that the flange c enters the outer channel of the convolution in process of formation, while the beveled flange c engages the outstanding fiange of said convolution.

The roller 0 is provided with a circumferntial'flange c and between said flange and the disk c-with a smaller flange 0 having a bevel surface c The manner of engagement of the roller 0 with the spiral is similar to that of the roller 0 and is illustrated in Fig. 25. The roll ers c}, 0 c are chiefly for guiding purposes and to prevent the oonvolutions of the tape from springing out of engagement with each other, although said rollers may serve to aid to some extent in clenching the flanges of the adiacent convolutions upon each. other, The collar'c? is splined on the reduced end of the mandrel 0 as shown in Fig. 17 and is providcd at some distance from its ax s, in a plane parallel'with a large diameter of the collar, with a slot 0 adapted to receive the end of the tape at the beginning of the operation of the'machine. It will be understood f1'om Fig. 17, that if the end of the tape is entered n said slot 0 and the collar rotated upon its axis, a hook will be formed on the tape which will cause the tape to Wind about the collar. After the tape has been )roperly entered beneath the rollers c, c", the winding action thereafter is automatic. It may be here observed that the mandrel 0" may be turned by means of the hand-whool c to loosen the mandrel from the spiral being formed thereon in the event the Winding should be too tight. The slide 1: is secured The mechanism I") con'ipriscs a disk (1 formed with a hub (1 supported 11] the standard of a slide (15; radially adjustable brackets (1 connected with the disk -:1 and supporting gripping and 'coinprcsslng rolls d", ii hosc :txcs zliarc ournnlcd in tho lurcatlons oi the brackets d": a sprocket-uhccl d mounted on the hub (l,' which hub is tubular; and asprockct-clmin d connecting said sproclrctwhccl'with a sproidict-whorl d", the opposite sidcs ol' the hub of which are made concave to afford friction (0110s. The sprocketwheel at has an opening at its center through which the shaft I) extends. The shaft 1) is equipped with a fixedly secured friction conc (1 adapted to engage onc side of the hub of the sprocket-W1iccl (1". Upon the end portion of the shaft .1) is a sleeve of which extends through a bearing in the frame A and is equipped at one end with a hand-wheel (1' and at the opposite end with a friction cone (1 adapted to bear'against the hub of the sprocket-wheel d. The extremity ol the shaft D projects beyond the hand-wheel d and has threaded thereon a hand-wheel d, by means of which the cones d' and d may be forced together to clamp the sprocket-wheel d between them and cause said sprocket-wheel to rotate with the shaft D It will thus appear that the disk d may be caused to rotate at will. Each of the rollers (1 preferably is formed as shown in detail in Figs. 18 and 19. That is to say, each roller comprises a metal tube whose ends are fitted with disks or flanges d; and a rubber roller fitted over the tube and conlined between the disks m and firmly secured thereto' by rivets d. The circumference of the rubber roller d" is made concave, as indicated at d. It will now be understood thatthe rollers (1 are adapted to lirmly grip the spiral; and inasmuch as the axes of the rollers are at right angles to the axis of the rotary disk (1, the rollers will exert a pull or twist upon the spiral, tending to rotate the spiral, and the rollers will also rotate upon their own axes as the convolutions of the spiral pass in turn beneath them. The manner of adjustment of the brackets Q! will be mulcrstood without further deseription, and it will be understood that any desired tension may be applied, so that the spiral will be more or less tightly wound and the flanges of the convolutions be more or less tightly compressed upon each other, according to the adjustment, of the rollers (1 It is desirable that the rollers d shall be capable of yielding somewhat, as well as eapable of exerting considerable friction upon. the spiral; and rubber answers the desired purpose admirably. The slide (1" is secured. upon its guide by clamping plates d so that the mechanism 1) may be adjusted with relation to the mandrel, at will. As doubtless has been understood, the adjustment of the slide 0 in its guides provides for the alinement of the mechanism with the forming rolls B, B and B in a lateral direction. The frame-section A may be adjusted vertically with relation to the main frame by means of an adjusting screw o as shown in Figs. 1 and 4, it being observed that said frame-section A is connected with a guide a of the main frame, which guide is provided with removable clamping plates as most clearly shown in Fig. l. j

The operation of the nu :hine will be readily understood from the foregoing detailed description. A. strip of metal 1 ol' the ilat shape shown in Fig. 2] is fed into the guide B of the machine, whence it pa. s through the forming rolls B thence through the guide 13", thence through the forming rolls B", thence through the guide B thence through the forming rolls B", thence through the guide B, the'nce through the guide formed by the bar a end the members connected therewith, where the end of the tape is entered in the slot of the removable collar 0 of the mandrel. The collar is then turned upon its axis to cause the tape to Wind thereon, the tape at the. same time being deflected from a straight course by the obli no surface 0 off the hub c of the disk 0. enthe tape is wrapped about the mandrel it is brought into engagement with the rollers 0 c and 0 being confined between said rollers and the collar of the mandrel. The machine, the operation of which is supposed to have been temporarily suspended to ermit the end of the tape to be connected with the collar 0 is again setin operation, and the formation of the flexible tubing is then proflexible tubing or armor, the mandrel is.

moved longitudinally a short distance till it occupies the position indicated by the dotted lines in Fig. 4, after which the collar 0 is carried by the armor away from the mandrel as the armor issues through the tubular hub d. The collar may be removed from the end ortion of the armor and may be employer in successive operations of the machine.

The foregoing detailed description has been given for c-learness of understanding only, and no undue limitation is to be understood therefrom. So far as I am aware, it is novel to pass a metal tape through forming rolls which serve to form flanges thereon adapted to interlock with each other in the formation of the spiral, to then deflect the preparatorily formed tape from ,a direct course, and form it into a spiral, and finally to pass the spiral through a device which serves to grip and rotate it and compress the interlocking flanges of the convolutionsupon each other.

What I regard as new, and desire to secure by Letters Patent, is r 1. In a machine of the character set forth, the combination of a mandrel, a plurality of rolls grouped about the mandrel and serving to form a spiral from a flanged strip of metal, a curved linger adjacent to the mandrel adaptr-id to extend into a channel in the flanged strip as it travels, and a guide-device in advance of said linger extending into the said channel in the strip.

2. In a machine of the character set forth, the combination of amandrel, a plurality of rolls grouped about the mandrel and serving to form .a spiral from a flanged strip of metal, a rotary member having its axis substantially in alinement with the axis of thejmandrel, and a plurality of spiral-engaging rolls carried by said rotary member and having their axes at an angle to the axis -of the rotary member. 3. In a machine of the character set forth, the combination of a frame-member, a mandrel supported thereon and'having a reeoted end, rolls grouped about the pro ectmg end of said mandrel and servin to form a spiral from a flanged strip of metail, a rotary member having an opcnin at its axis in alinement with the mandre and spiral-engagin means carried b said rotary member. 4. n a machine of tlie character set forth, the combination of a frame-member, a mandrel supported thereon and havinga rojecting end, rolls grou ed about the pro ectmg end'of said mandre and servin to form a spiral from a flanged strip of meta a rotary member having an openin at its axis in alinement with the mandre, and spiral-engaging rolls carried by said rotary member and having axes substantially at right angles to the axis of said rotary member.

5. In a machine of the character set forth,

the combination with mears for forming a flanged strip, of metal into a spiral, of spiralgripping and rotating means comprising a rotary member having an axial opening therethrough, and adjustable spiral-engaging means carried by said rotary member.

6. In a machine of the character set forth, the combination with means for forming a flanged strip of metal into a spiral, of spiralgripping and rotating means comprising a rotary member having an axial opening therethrough, and adjustable spiral-engaging rolls carried by said rotary member and having their axes at an angle to the axis of said rotary member.

7. 'In a machine of the character set forth, the combination with means for formin a V strip of metal into a spiral, of a rotata le member equipped with spiral-engaging rolls, driving means therefor, and means for connecting and disconnecting said rotatable member with said driving means at n ill.

8. In a machine of thecharacter set forth, the combination of a stationary member equipped With a plurality of rolls grouped about an axis, a mandrel )rojecting through said stationary member between said rolls and having a detachable end-section provided ith means for engaging the end of a strip of metal, and a rotary member having an axial o )ening therethrough and equipped r. ith s find-engaging rolls grouped about the axis of said mandrel.

9. In a machine of the character set forth, the combination of a main frame, a plurality of pairs of rolls mounted thereon am serving to feed a strip of metal and form flanges on opposite sides thereof, a frame-section adjustably connected nith said main frame, and spiral-forming means mounted on said adjustable fininc-seetion.

justable transversel extending across the path of the stri 1.1. In a machine of the character set forth, the combination of a plurality of pairs of? forming rolls adapted to feed a strip of metal 'and form flanges on opposite sides thereof,

spirahforming means ad ustable crosswise of t we path. of the metal strip, and spiral-mint ing and eompressing means beyond said s ii- I ral-forming means and adjustablewith rela-- 5 tion thereto.

1 2. In a machine of the character set forth,

the combination of a main frame, a plural ty j of pairs of forming rolls mounted thereon,'. a, frame-section connected with and vertically;

adjustable with relation to the main frainaa slide mounted on said frame-section ended and e ui ped with a plurality of rolls groupe a out an axis, a mandrel projecting between said last-named rolls, a second slide mounted on said frame-section and adjustable toward and away from said first-named slide, and a rotary member mounted on said second-named slide and equipped with spiral-en aging means, for the purpose set forth. 13. n a machine of the character set forth, the combination of a plurality of alined airs of formin rolls adapted to feed a strip of metal and form flanges thereon, a mandre 0 metal, spiral-forming rolls grouped a out said mandrel, an oblique surface adjacent to said mandrel coacting with said spiral forming rolls, and a rotary member having an axial opening in alinement n ith said mandrel and er nipped with spiral-engaging rolls.

14.111 a machine of the character set'forth, the combination of a plurality of alined pairs of forming rolls adapted to feed a strip of metal and form flanges thereon, a mandrel extending across the path of the stri of metal, spiral-forming rolls grouped it out said mandrel, an oblique surface adjacent to said mandrel coasting v. ith said spiral formwith relation w the main frame, a mem or carried by said Slide ing rolls, a rotatable member having an axial opening in alinement with said nmndrel and equipped with spiral-engaging rolls, and a shaft located beneath said rotatable member and'geared thereto.

15. In a machine of the character set forth, the combination of a plurality of alined pairs of forming rolls adapted to feed a strip of metal and form flanges thereon, a mandrel extending across the path of the strip of metal, spirabforming rolls grouped about said mandrel, an oblique surface adjacent to said mandrel coaeting with said spiral-forming rolls, a rotatable member having an axial opening in alinement with said mandrel and ;said removable section being 'means for engagi metal, rolls grouped about said mandrel and flanges of adjacent the formation of a spiral, and ing,

equipped at one end with a hand-wheel and at the opposite end with a removable section, provided with the end of a strip serving in spiral-rotating and com iressing means comprising a rotary mem er having, an axial opening and equi )ped with spiral-engaging means located adjacent to the removable section of said mandrel.

17. In a machine of the character set forth, the combination with rolls adapted to feed a strip of metal and form flanges on opposite sides thereof, of a stationary member equipped with a hub having an obli uesurface adapted to deflect the strip 0 metal from its direct course, rolls grouped about said hub, and a guide having a curved finger extending about a rortion of said hub and adapted to engage a flange of the strip of metal.

18. 111 a machine of the character set forth, the combination with means for feeding a strip of metal and forming flanges on opposite sides thereof, of a stationar s member equipped with a hub provided with an oblique surface ad aptcd to deflect the strip of metal from a direct course, rolls grouped about said hub, and adjustaliile strip-guiding means located ad jaccnt to said hub.

19. 1n a machine of the character set forth, the combination with means for forming a flanged strip of metal into a spiral with the flanges of adjacent convolutions interlocking, of spiral rotating and compressing means comprising a rotary member, and a plurality of' yielding spiral-engaging; rolls carried by said rotary member.

l l l l l l 1 l l ,3 l

l p l l l l l 20. in a machine of the character set-forth, the combination with means for forming a flanged strip of metal into a spiral with the flanges of adjacent convolutions interlocking, of spiral-rotating and compressingmeans'comprising a rotary member and a plurality of yielding spiral-engaging*rolls mounted on said rotary member with their axes at an angle to the axis of said rotary member.

21. In a machine of the character set forth, the combination with means for forming! a flanged strip of metal into a spiral with the convoiutions interlock; of spiral rotating and compressing: means comprising a rotarv member, a plurality of adjustable brackets mounted on said rotary member, and spiral engag ing rollsmounted on said brackets and composed of yielding material.

22. In a machine of the character sr-t forth, the combination of a main frame, a plurality of alined pairs of forming rolls located at one side of the main frame and having shafts extending across and supported on the main flame, one of said shafts projecting beyond the others and equipped with driving means, means gearing said shafts together, an adjustable frame connected with the main frame, spiral-forming means mounted on said adjustable-frame, spiral-rotating and compressing means located ad jaccntto said spii alforming means, and ashat't servingto rotate the spiral-rotating and compressing means, said last-named shaft being geared to one of said first-named shafts.

In a machine of the character set forth, the con'ibination with means for feeding a flanged strip of metal, of means for forming the strii into a spiral, and rotary coihgriping" rollers having their peripheries formed of rubber and adapted to engage with the coil, for the purpose set forth.

JACOB UllRl.

In presence of- L. .HmsLAn,

It. A. Sonanrnn. 

